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IO505: 4-Port Serial I/O Module

Galvanically isolated 4 port serial I/O module supporting RS232, RS422 and RS485, with Simulink driver blocks

This is a very versatile asynchronous serial module supporting RS232, RS422, and RS485 on each of the 4 ports. The ports are all galvanically isolated and support very high baud rates, especially for RS422 and RS485. The Simulink Real-Time driver blockset for this module offers a composite Send/Receive block as well as low-level setup, send, receive, FIFO, status, and utility blocks.

  • 4 independent isolated serial ports, galvanic isolation of each transceiver channel
  • Supports RS232, RS422, RS485 half-duplex, and RS485 full-duplex
  • RS232 baud rates of up to 921.6 kb/s
  • RS422/RS485 baud rates over 5 Mb/s
Form factor PMC
PCI bus 32-bit, 33 MHz
Power consumption 4.75 W, maximum
Operating temperature -40 ºC to +85 ºC
Relative humidity 5 to 95 %, non-condensing
Interface type Asynchronous serial
Number of channels/ports 4
Physical interface Software-selectable per channel: RS232, RS422, RS485 full-duplex, RS485 half-duplex
Programmable baud rates RS232: up to 921.6 kb/s
RS422/RS485: up to 5.5296.6 Mb/s
I/O signals RS232: TxD, RxD, RTS, CTS, GND
RS422/RS485 full-duplex: TxD+/-, RxD+/-, GND
RS422/RS485 half-duplex: Dx+/-, GND
Termination Software-selectable (120 Ohm)
UART Exar XR17D154
Transceiver MAX3161E
ESD protection ±15kV
Mean time between failures (MTBF)* 694,000 hours
MTBF (Mean Time Between Failure) - MTBF values shown are based on calculation according to MIL-HDBK-217F and MIL-HDBK-217F Notice 2; Environment: GB 20°C. The MTBF calculation is based on component FIT rates provided by the component suppliers. If FIT rates are not available, MIL-HDBK-217F and MIL-HDBK-217F Notice 2 formulas are used for the FIT rate calculation.
Item ID Product Name Components
20505X IO505
  • 1 x IO505 I/O module
  • 1 x shielded round 50-pin SCSI-II cable, 1.5m long
  • 1 x 50-pin screw terminal board with DIN-rail mount
  • Driver block library for Simulink Real-Time™
  • Installation into real-time target machine

Key to X in Item ID
Please replace the X with the code number of the specific target machine into which this I/O module will be installed:

  • 5 = Mobile real-time target machine
  • 6 = Performance real-time target machine
  • 8 = Baseline real-time target machine

Pricing information
We do not publish pricing information on our website. Upon request by e-mail or phone, we can provide a complete price list covering our entire product portfolio in various currencies. We recommend that you contact us to discuss your specific needs. We can then quickly provide you with a tailored quotation including technical and pricing information.


Included in the Delivery

  • I/O module installed into real-time target machine
  • Cable
  • Terminal board
  • Simulink driver blocks
  • Test models
  • Comprehensive documentation

Supported target machines


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